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diff --git a/doc/contributing.texi b/doc/contributing.texi
index 925c584e42..0073f24518 100644
--- a/doc/contributing.texi
+++ b/doc/contributing.texi
@@ -334,6 +334,12 @@ updates for a given software package in a single place and have them
 affect the whole system---something that bundled copies prevent.
 
 @item
+If the authors of the packaged software provide a cryptographic
+signature for the release tarball, make an effort to verify the
+authenticity of the archive.  For a detached GPG signature file this
+would be done with the @code{gpg --verify} command.
+
+@item
 Take a look at the profile reported by @command{guix size}
 (@pxref{Invoking guix size}).  This will allow you to notice references
 to other packages unwillingly retained.  It may also help determine